Fluoroplastic FEP Resin

Get to Know FEP 4622

Everflon™ FEP 4622 is a melt-processible fluoroplastic resin available in pellet form. It is a copolymer of tetrafluoroeth-ylene and hexafluoropropylene, without additives, that meets the requirements of ASTM D 2116 Type II. With a relatively high melt flow rate and excellent electrical properties, Ever-flon™ FEP 4622 has been specifically designed for high-speed extrusion of thin coatings on small-gauge wires for twisted-pair constructions.

This resin provides the electrical and mechanical properties needed for low voltage applications. In addition, Everflon™ FEP 4622 has a higher melt flow rate than most other fluoro-plastic resins. This permits higher extrusion speeds and easier processing, making Everflon™ FEP 4622 a cost-ef-fective alternative for producing thin-wall extrusions.

Everflon™ FEP 4622 is designed and made to have improved adhesion to copper wire under specific wireline process conditions, low dissipation factor at high frequen-cies, and significant plate-out resistance in melt extrusion. It is suitable as a solid insulator and as a foamed insulator, when used with an appropriate nucleant in a nitrogen gas injection process.

Everflon™ FEP 4622 is used when traditional extrusion and molding processes are required for producing products with the superior properties of a fluoroplastic resin. Compared to other thermoplastics, the high melt strength and thermal stability of Everflon™ FEP 4622 can be used to improve processing rates.

Compared with other fluoroplastics, creep resistance at high service temperatures provides a superior balance and level of end-use properties. Everflon™ FEP 4622 combines the processing ease of conventional thermoplastics with many properties similar to those of polytetrafluoroethylene.

Properly processed products made from neat Everflon™ FEP 4622 resin provide the superior properties characteristic of fluoroplas-tic resins: chemical inertness, exceptional dielectric properties, heat resistance, toughness and flexibility, low coefficient of friction, nonstick characteristics, negligible moisture absorption, low flammability, performance at temperature extremes, and excellent weather resistance.

In a flame situation, products of Everflon™ FEP 4622 resist ignition and do not promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke

Typical Applications

Small diameter, thin wall wire and cable insulation; industrial film; and intricate or thin wall parts made by injec-tion molding.

Processing Guide

Everflon™ FEP fluoroplastic resin can be processed by conventional melt extrusion, and by injection, compression, and blow molding processes.

For smooth feeding to extrusion equipment, it is supplied in 3 mm (0.12 in) pellets.

The extruders and molding machines used for Everflon™ FEP should be constructed of high nickel alloy corrosion-resistant materials and be capable of operating at temperatures up to 400 °C (750 °F)

Precaution

Equipment used to process at melt temperatures should be provided with local exhaust ventilation (LEV) to com-pletely remove all fumes and vapors from the processing area. In addition, care should be exercised to avoid the contamination of cigarettes and other forms of smoking tobacco when using fluoroplastic resins. Before process-ing any fluoroplastics, read the Material Safety Data Sheet.

Data List

Property	Test Method	Unit	Typical Value
GENERAL
Specific Gravity	ASTM D792		2.15
Critical Shear Rate, 372 °C (702 °F)		1/s	150
Guide DDR Range for Jacket Extrusion			60–120
MECHANICAL
Impact Strength, Notched Izod, 23 °C (73 °F)	ASTM D256	kJ/m²	No Break
MIT Folding Endurance (0.20 mm, 8 mil film)	ASTM D2176	Cycles	500,000
Hardness Durometer	ISO 868 / ASTM D2240		D56
ELECTRICAL
Dielectric Strength, Short Time, 0.25 mm (0.010 in)	IEC 243 / ASTM D149	kV/mm	> 100
Relative Permittivity, 1 kHz	IEC 250 / ASTM D150		2.03
Relative Permittivity, 1 GHz	IEC 250 / ASTM D150		2.03
Dissipation Factor, tg δ, 1 kHz	ISO 1325 / ASTM D150		0.00005
Dissipation Factor, tg δ, 1 GHz	ISO 1325 / ASTM D150		0.0007
OTHER
Water Absorption, 24 hr	ASTM D570	%	<0.01
Weather and Chemical Resistance			Excellent
Limiting Oxygen Index	ISO 4589 / ASTM D2863	%	> 95
Continuous Service Temperature		°C (°F)	205 (400)
Flammability Classification	UL 94		V-0

Handing & Package

Everflon™ FEP is packaged in 25-kg, single layer, plastic bags. For convenient shipment, orders of 1000-kg gallary are recommended.

The properties of Everflon™ FEP resin are not affected by storage time. Ambient storage conditions should be designed to avoid airborne contamination and water condensation on the resin when it is removed from contain-ers.

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